LXR linux/arch/arm/mach-s3c64xx/include/mach/dma.h

   1/* linux/arch/arm/mach-s3c6400/include/mach/dma.h
   2 *
   3 * Copyright 2008 Openmoko, Inc.
   4 * Copyright 2008 Simtec Electronics
   5 *      Ben Dooks <ben@simtec.co.uk>
   6 *      http://armlinux.simtec.co.uk/
   7 *
   8 * S3C6400 - DMA support
   9 */
  10
  11#ifndef __ASM_ARCH_DMA_H
  12#define __ASM_ARCH_DMA_H __FILE__
  13
  14#define S3C_DMA_CHANNELS        (16)
  15
  16/* see mach-s3c2410/dma.h for notes on dma channel numbers */
  17
  18/* Note, for the S3C64XX architecture we keep the DMACH_
  19 * defines in the order they are allocated to [S]DMA0/[S]DMA1
  20 * so that is easy to do DHACH_ -> DMA controller conversion
  21 */
  22enum dma_ch {
  23        /* DMA0/SDMA0 */
  24        DMACH_DT_PROP = -1, /* not yet supported, do not use */
  25        DMACH_UART0 = 0,
  26        DMACH_UART0_SRC2,
  27        DMACH_UART1,
  28        DMACH_UART1_SRC2,
  29        DMACH_UART2,
  30        DMACH_UART2_SRC2,
  31        DMACH_UART3,
  32        DMACH_UART3_SRC2,
  33        DMACH_PCM0_TX,
  34        DMACH_PCM0_RX,
  35        DMACH_I2S0_OUT,
  36        DMACH_I2S0_IN,
  37        DMACH_SPI0_TX,
  38        DMACH_SPI0_RX,
  39        DMACH_HSI_I2SV40_TX,
  40        DMACH_HSI_I2SV40_RX,
  41
  42        /* DMA1/SDMA1 */
  43        DMACH_PCM1_TX = 16,
  44        DMACH_PCM1_RX,
  45        DMACH_I2S1_OUT,
  46        DMACH_I2S1_IN,
  47        DMACH_SPI1_TX,
  48        DMACH_SPI1_RX,
  49        DMACH_AC97_PCMOUT,
  50        DMACH_AC97_PCMIN,
  51        DMACH_AC97_MICIN,
  52        DMACH_PWM,
  53        DMACH_IRDA,
  54        DMACH_EXTERNAL,
  55        DMACH_RES1,
  56        DMACH_RES2,
  57        DMACH_SECURITY_RX,      /* SDMA1 only */
  58        DMACH_SECURITY_TX,      /* SDMA1 only */
  59        DMACH_MAX               /* the end */
  60};
  61
  62static inline bool samsung_dma_has_circular(void)
  63{
  64        return true;
  65}
  66
  67static inline bool samsung_dma_is_dmadev(void)
  68{
  69        return false;
  70}
  71#define S3C2410_DMAF_CIRCULAR           (1 << 0)
  72
  73#include <plat/dma.h>
  74
  75#define DMACH_LOW_LEVEL (1<<28) /* use this to specifiy hardware ch no */
  76
  77struct s3c64xx_dma_buff;
  78
  79/** s3c64xx_dma_buff - S3C64XX DMA buffer descriptor
  80 * @next: Pointer to next buffer in queue or ring.
  81 * @pw: Client provided identifier
  82 * @lli: Pointer to hardware descriptor this buffer is associated with.
  83 * @lli_dma: Hardare address of the descriptor.
  84 */
  85struct s3c64xx_dma_buff {
  86        struct s3c64xx_dma_buff *next;
  87
  88        void                    *pw;
  89        struct pl080s_lli       *lli;
  90        dma_addr_t               lli_dma;
  91};
  92
  93struct s3c64xx_dmac;
  94
  95struct s3c2410_dma_chan {
  96        unsigned char            number;      /* number of this dma channel */
  97        unsigned char            in_use;      /* channel allocated */
  98        unsigned char            bit;         /* bit for enable/disable/etc */
  99        unsigned char            hw_width;
 100        unsigned char            peripheral;
 101
 102        unsigned int             flags;
 103        enum dma_data_direction  source;
 104
 105
 106        dma_addr_t              dev_addr;
 107
 108        struct s3c2410_dma_client *client;
 109        struct s3c64xx_dmac     *dmac;          /* pointer to controller */
 110
 111        void __iomem            *regs;
 112
 113        /* cdriver callbacks */
 114        s3c2410_dma_cbfn_t       callback_fn;   /* buffer done callback */
 115        s3c2410_dma_opfn_t       op_fn;         /* channel op callback */
 116
 117        /* buffer list and information */
 118        struct s3c64xx_dma_buff *curr;          /* current dma buffer */
 119        struct s3c64xx_dma_buff *next;          /* next buffer to load */
 120        struct s3c64xx_dma_buff *end;           /* end of queue */
 121
 122        /* note, when channel is running in circular mode, curr is the
 123         * first buffer enqueued, end is the last and curr is where the
 124         * last buffer-done event is set-at. The buffers are not freed
 125         * and the last buffer hardware descriptor points back to the
 126         * first.
 127         */
 128};
 129
 130#include <plat/dma-core.h>
 131
 132#endif /* __ASM_ARCH_IRQ_H */
 133